Sir Roger Hollis: A Mole in MI5?

The question was almost unthinkable.
Sixteen months ago, as Britain rocked with revelations that Sir Anthony
Blunt, the Queen's own art curator, had been a Soviet agent, Writer
Chapman Pincher, dean of Fleet Street's spy watchers, pondered in the
Daily Express: "Was M15 Chief Hollis linked with the KGB?" Nobody
pressed for an answer, and no wonder. Sir Roger Hollis had spent nine
cold-war years as D.G., or director general of M15, Britain's
counterintelligence service, a civil servant so umbrous that his name
was never publicly mentioned. After his retirement in 1965 Hollis led a
pastoral life of...